marla earned $400.00 interest over 2 years on a $4000.00 investment. jovita earned $960.00 interest over 4 yars on her $ 6000.00 investment. Who had the higher rate of interest?

I = prt

Maria:
400 = 4000 * r * 2

Jovita:
960 = 6000 * r * 4

600=4000*r*2

if $4000 invrsted at simple interest for two yrars earn #600 than rate of interest must be

To find out who had the higher rate of interest, we need to calculate the interest rate for each investment. The interest rate can be calculated by dividing the interest earned by the principal amount and then multiplying by 100 to get a percentage.

Let's start with Marla's investment:
Interest earned by Marla = $400.00
Principal amount = $4000.00

Interest rate for Marla = (Interest earned by Marla / Principal amount) * 100
= ($400.00 / $4000.00) * 100
= 0.1 * 100
= 10%

Now let's calculate the interest rate for Jovita's investment:
Interest earned by Jovita = $960.00
Principal amount = $6000.00

Interest rate for Jovita = (Interest earned by Jovita / Principal amount) * 100
= ($960.00 / $6000.00) * 100
= 0.16 * 100
= 16%

Comparing the two interest rates, we can see that Jovita had a higher rate of interest with 16% compared to Marla's 10%.